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December 2016

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According to Oerlikon Barmag, with the Evotape, a process for manufacturing tapes has been developed, that has revolutionised the process used to date and depending on the configuration, the systems output can be increased by up to threefold.

The Evotape operates with a cold pre-drawing process and in the subsequent, second drawing stage, the tapes are lighter and they take on the heat from the hot-air oven more easily.

“These two drawing stages result in superior process stability, reaching the same tenacity values with higher speeds or superior properties at the same speed,” the German company observed.

“The splitting of the drawing process also ensures a low overall draw ratio and as the cut width of the overall drawing is defined, this is also reduced,” Oerlikon said.

“Consequently, more tapes can be manufactured, which, in addition to the higher process speed, increase the system's output, which leads to considerable reduction in specific energy consumption per kg,” it averred.

Another product from the company, the automatic Wintape precision winder, supplements the Evotape concept in the take-up stage as electronic crossing angles ensure perfect package build with optimum quality for further downstream processing.

“As the tapes dwell in the yarn guide during package transfer, automatic take-up of folded tapes is possible,” the company explained.

It further added that another plus point is that with two parking positions for full packages, the system configuration for carpet backing fabrics can operate for 24 hours without package transfer, hence simplifying shift work.

As per the company, operating the Wintape in conjunction with the Evotape, opens up further benefits offered by the new precision winder as production waste occurring during package transfer can be directly routed back to the extruder. (AR)